July 1 was the cutoff point for several players whose contracts with Man United expired.
The big name there is David de Gea. As things stand, his future is in the balance, and he might yet sign a new deal - but he's officially not a Man United player right now.
Phil Jones and Axel Tuanzebe are also free agents. Unlike De Gea, they are not coming back.
As for the incoming transfers, none has been announced yet, although Mason Mount is very close to becoming the first arrival.
With this in mind, here's the full Man United squad right now - including the players who might be on the move shortly.
Goalkeepers
Defenders
Lisandro Martinez, Raphael Varane, Harry Maguire, Victor Lindelof, Eric Bailly, Teden Mengi, Luke Shaw, Tyrell Malacia, Alex Telles, Brandon Williams, Alvaro Fernandez, Diogo Dalot, Aaron Wan-Bissaka
Midfielders
Casemiro, Scott McTominay, Christian Eriksen, Fred, Donny van de Beek, Kobbie Mainoo, Bruno Fernandes, Hannibal Mejbri